package thread;

public class SyncDemo4 {
    public static void main(String[] args) {
       // StringBuilder sb= new StringBuilder();
        StringBuffer sb = new StringBuffer();
        Thread t1=new Thread(){
            public  void  run(){
                for (int i=0;i<1000;i++){
                    sb.append("abc");
                }
            }
        };
        Thread t2 = new Thread() {
            public void run(){
                for (int i = 0;i<1000;i++){
                    sb.append("def");
            }
            }
        };
        t1.start();
        t2.start();

        try {
            Thread.sleep(10);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(sb.length());
        System.out.println(sb);
    }
}
